MORPHOLOGY OF LE3AVES AND FLOWERS 



595 



Wavy margin, when the margin forms a wavy line bending 

 slightly inward and outward in succession, as in the bitter dock 

 {Bumex obtusif alius). 



Pig. 4491 T_ Fig. 449 II Pig. 449 III Pig. 449 IV Pig. 449 V 



Fig. 449. I. Leaf of Daisy, spatulate in shape with a serrate margin. II. 

 Spiny-pointed, serrulate leaflet of alfalfa. III. "Wavy-margined leaf of 

 Pigweed^' (.Amarantfms) . VT. Ovate, dentate leaf of Snowball. V. Serrate 

 leaf of 'Hen-bit. 



(After Thome.) 



Toothed or dentate, when the margin is cut into sharp teeth and 

 the teeth point out, as in the lower leaves of the daisy fleabane 

 {Erigeron annuus). 



Fig. 450. Cleft and plnnatifid leaves of Wild Lettuce. 

 (After Thome.) 



